Locking-insulator.



UNITED STATES Patented February 2l, 1905.

PATENT LCKING-INSULATOR.J

SPECIFICATION forming part of Letters Patent No. 783,229, dated February 21, 1905.

Application led March 19, 1903. Serial 110.148,55.

To al?, uffi/077e it nifty concern:

Be it known that I, Louis STniNBEiienn, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of NewYork, have invented a new and Improved Locking- Insulator, of which the following is a full, clear, and exact description.

My invention relates more particularly to an improved insulator for carryii'ig wires for electric light and power and for telegraph and telephone services and in all other relations where wires are required te be insulated from their supports.

My invention saves time and money iiow wasted on tie-wires. By its use even an unskilled workman is able to fasten and locl; the wire to the insulator. 1t also tends to save battery-power now wasted incidental to leal;- age from tie-wires and is ready for mounting without the use of pins and borii'ig-tools.

Reference is to be had to the accompanying drawings, forming a part of this specilication, in which similar characters of reference indicate corresponding parts in all the ligures.

Figure 1 shows a central section through one form of my locking-insulator. Fig. 2 is a fragi'nei'itary section otherwise somewhat similar to Fig. 1,' but showing a boss 16 partly broken away. Fig. 3 is a fragmentary section otherwise somewhat similar to Fig. 1, but showing the metallic face 17 as not engaging the wire. Fig. 4 is a central section through my preferred form, and Fig. 5 is a horizontal section upon tlieline 5 5 of Fig. 4 lool ingtoward the bottom of the drawing.

In Figs. 1, 2, and 3 the body 1 of the insulator is provided internally with a thread 2 and with a petticoat 3. ln Fig. el the bodyd is rigidly niountedpiipon a screw-bolt 5, which is threaded at T for the purpose of mounting the insulator. ln this forni the screw-bolt is surrounded by a concavity 8. ln both forms the groove E) is provided for the wire. rhere either form is used, the upper end of the body portion is provided with a slot 10, which is provided. with an enlarged portion 13 and sepa* rates the two parts 11 12, as indicated more particularly in Fig. 5. The Lipper end of the body portion is provided at 14C with threads.

l The cap 15 is threaded internally and screwed upon the body portion, as shown in all of the figures.

Mounted centrally within the cap 15 is a boss 16 of substantially frusto-conical form and provided at its lower end with a concave surface 16". The wire 18 is disposed within the slot 10 and directly crosses the enlarged portion 13 thereof, and then the cap 15 is screwed down iirmly into position, so that the boss 16 will normally engage the wire. An annular facing 1T, of metal, is provided with an annular portion 17", whereby the same is rigidly connected with thc outer portion of the cap 15. Should the facing 1T be-brolen or from any other cause fail to make a perfect tit, as indicated at 17", the boss 16 grips the wire and holds the same lirmly in position. On the other hand, if the boss 162L chances to be broken or if from any other cause this boss lfails to bind upon the wire the metallic facing 17 will nevertheless hold the wire in position, as indicated in F ig. 2.

The annular facing 17 may be connected with the caps 15 15L in a variety of ways, dependingI to some extent upon the nature of the material of which the insulating portion 15 is made. l preferably malte this portion ol the insulating substance commercially known as electrosef This material is plastic and may bc molded into any desired form. \Vhen forced under pressure into a mold and into contact with the facing IT, it adheres perfectly and forms a rigid connection. lt is siitliciently elastic to sustain considerable stress without breaking or chipping oli' and has none of the objectionable brittle qualities peculiar to glass. 'lhe electrose when in plasticI form is pressed directly against the metallic facing, so as to spread upon both sides of theannular web portion 1T". 'lfheiiisiilator provides lgreat strength where the same is most needed. By its use a metallic surface is placed in direct contact with the wire, so as to loclt the same in an eiiicient and reliable manner. `When thus made, the `insulatoi will last indelinitely.

l he device embodying the construction linst mentioned is for the purpose of allording a plurality of points which bear independently upon the surface of the wire, so that if the pressure at one point should fail to hold the wire the pressure at other points will be effective for the purpose. ln cases where the screw-bolt 5 is used, as indicated in Fig. A, as the head 6 is irmly embedded in the substance of the insulation 4, the screw-bolt and the insulating body portion virtually constitute a single part of great strength and which may be applied by merely screwing the threaded portion 7 into a wooden support.

ln Fig. 4 the cap 15 is provided integrally with an umbrella-shaped shield or web 15h. The purpose of this shield is to ward off rain, sleet, &c., from the annular member 17 and from the wire 18 at the points where it is engag'ed, thereby to prevent leakage due to moisture.

VI t will be seen that the annular metallic facing not only binds the wire in position, but serves also to strengthen the cap to which it is connected.

.l do not limit myself to any particular shape for the slot l() or the enlargement 13. Neither do l. limit myself to the exact construction of any of the other several parts shown.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A locking-insulator, comprising' a body portion provided with a s urface for engag'ing' a wire, a cap of insulating material detachably connected with said body portion, and an annular facing of metal rigidly connected with said cap of insulating' material for engaging said wire.

Q. As an article of manufacture, a cap provided with a weather-shield and with a metallic face disposed adjacent to said weathershield and adapted to be kept dry thereby.

3. As an article of manufacture, a cap provided with an annular portion, and an annular metallic member connected rigidly with said portion and provided with a bearing-surface, said cap being' further provided with a rain-shield integral therewith and adapted to project over said metallic member.

4. As an article of manufacture, a revoluble cap made of insulating material and provided with a metallic member molded upon said cap.

5. As an article of manufacture, a cap of insulating material having an annular portion, and a metallic member of general annular form connected rigidly with said annular portion, said cap being' fm'ther provided with a screwthread.

6. As an article of manufacture, a cap made of insulating' material provided with annular groove, and a metallic member provided with a portion projecting into said groove and inimovablerelatively thereto for the purpose of securing said metallic member and said cap firmly together.

7. As an article of manufacture, a cap made of insulating material and provided with an annular portion having an annular groove concentric therewith and disposed centrally thereof, and a metallic ring` provided with an annular portion engaging said groovvx and also provided with a bearing-surface- 8. As an article of manufacture, a cap made of insulating material and provided with an annular portion, and an annular member of metal anchored to said annular portion, being thus permanently secured thereto.

9. As an article of nianufacture, a cap provided with an annular edgeef insulating material, and a metallic member mounted upon said edge of insulating'material for the purpose of strengthening the same.

10. As an article of inanufacture, a member of insulating material and an annular metallic member connected rigidly therewith and forminga bearing edge tlieiefm',said member of insulating' material being further provided with means whereby it may be mounted.

ll. As an article of manufacture, a member of insulating' material provided with an annular portion, and an annular metallic member connected rigidly with said annular portion and forming a bearing edge therefor, said member of insulating material being further provided withmeans whereby it may be mounted.

In testimony whereof l have signed my name to this specification in the presence of two sul scribing witnesses.

LOUIS S'FEINBERG lC lt.

Vllitnesses:

WAI .'roN H am". iso N J'No. M. Rrr'run. 

